Trello is another free tool that teachers and students can use to create online corkboards/bulletin boards (like Padlet and other sites on The Best Online Virtual “Corkboards” (or “Bulletin Boards”) list).
TechCrunch calls Trello “collaborative task-management software,” so it has a lot of other bells and whistles, but it can also be used very simply for students to copy, paste and categorize images they grab off the web. That’s how I use Padlet — students can create picture data sets as part of inductive learning (see The Best Resources About Inductive Learning & Teaching).
It’s a little clunkier to add images to Trello than to other tools, though not that much so. It’s just an extra click (it’s created as an attachment to each “card” and then it is displayed).
With School District content filters, you can never have too many options to choose from since who knows what site will be blocked?
You can read more about Trello at the TechCrunch post.